| 1 | Education Procurement Service (EPS) Limerick | Education | ie | 48 | €102.6M |
| 2 | Health Service Executive (HSE) Kildare | Health | ie | 45 | €1.3B |
| 3 | Trinity College Dublin the University of Dublin_336 Dublin | Education | ie | 42 | €11.4M |
| 4 | Dublin City Council Dublin | General public services | ie | 39 | €1.2B |
| 5 | Office of Public Works (OPW) Trim | General public services | ie | 34 | €23.6M |
| 6 | Department of Housing Local Government and Heritage Wexford | Housing and community amenities | ie | 31 | €22.9M |
| 7 | Limerick City and County Council_103432 Limerick. | General public services | ie | 27 | €28.3M |
| 8 | Kildare County Council_385 Naas | General public services | ie | 23 | €13.3M |
| 9 | Newry Mourne and Down District Council Newry | General public services | ie | 23 | €1.4M |
| 10 | Electricity Supply Board ( ESB ) Dublin | General public services | ie | 21 | €80.5M |
| 11 | Iarnród Eireann-Irish Rail Dublin | Rail services | ie | 20 | €60.6M |
| 12 | Clare County Council Ennis | General public services | ie | 18 | €9.3M |
| 13 | Donegal Education and Training Board_368 Letterkenny | Education | ie | 18 | €31.4M |
| 14 | Department of Justice, Home Affairs and Migration Dublin | General public services | ie | 17 | €23.5M |
| 15 | University College Cork Cork | Education | ie | 15 | €10.1M |
| 16 | University College Dublin ( UCD ) Dublin | Education | ie | 15 | €48.5M |
| 17 | Cork City Council Cork | General public services | ie | 15 | €602.6M |
| 18 | Transport Infrastructure Ireland (TII) Dublin | General public services | ie | 14 | €7.7B |
| 19 | Mayo County Council_1127 Castlebar | General public services | ie | 13 | €1.6M |
| 20 | South East Technological University (SETU) WATERFORD | Education | ie | 12 | €7.3M |
| 21 | Technological University of the Shannon: Midlands Midwest (TUSMM) Limerick | Education | ie | 12 | €11.0M |
| 22 | Dun Laoghaire-Rathdown County Council Dún Laoghaire | General public services | ie | 12 | €59.4M |
| 23 | Donegal County Council_1193 Lifford | General public services | ie | 12 | €1.7M |
| 24 | An Post_391 Dublin 1 | General public services | ie | 12 | €5 |
| 25 | Clúid Housing Association Dublin | Housing and community amenities | ie | 11 | €1.2B |
| 26 | Department of Agriculture Food and the Marine Dublin | General public services | ie | 11 | €38.5M |
| 27 | St James's Hospital Dublin | Health | ie | 11 | €49.3M |
| 28 | Tipperary County Council Clonmel, Nenagh | General public services | ie | 11 | €17.9M |
| 29 | Irish Defence Forces_1144 Newbridge | Defence | ie | 11 | €4.0M |
| 30 | Kilkenny County Council_1185 Kilkenny | General public services | ie | 11 | €4.3M |
| 31 | Teagasc - the Agriculture and Food Development Authority Carlow | General public services | ie | 10 | €2.5M |
| 32 | Causeway Coast and Glens Borough Council Coleraine | General public services | ie | 10 | €1.3M |
| 33 | University of Limerick_1124 Limerick | Education | ie | 10 | €3.4M |
| 34 | Department of Foreign Affairs and Trade/An Roinn Gnóthaà Eachtracha agus Trádála Dublin | General public services | ie | 10 | €6.7M |
| 35 | Kerry County Council_1204 Tralee | General public services | ie | 10 | €168.2M |
| 36 | Enterprise Ireland Dublin | Economic affairs | ie | 10 | €86.1M |
| 37 | Marine Institute_1141 Galway | notice.buyer_activities.env-pro | ie | 10 | €2.9M |
| 38 | Cork County Council Cork | General public services | ie | 10 | €296.0M |
| 39 | An Garda SÃochána_1192 Dublin | Public order and safety | ie | 10 | €510.2M |
| 40 | The Office of Government Procurement Dublin | General public services | ie | 10 | €1.6B |
| 41 | Irish Prison Service Longford | General public services | ie | 10 | €37.2M |
| 42 | Bord Bia (Irish Food Board) Ballsbridge, Dublin 4 | General public services | ie | 10 | €4.0M |
| 43 | Louth and Meath Education and Training Board 1384 Navan | Education | ie | 9 | €3.8M |
| 44 | Westmeath County Council Mullingar | General public services | ie | 9 | €2.3M |
| 45 | National Transport Authority_1149 Dublin | General public services | ie | 9 | €63.4M |
| 46 | Uisce Éireann Dublin | General public services | ie | 9 | €3.2B |
| 47 | Department of Climate Energy and the Environment Dublin | notice.buyer_activities.env-pro | ie | 9 | €6.3M |
| 48 | Department of Social Protection_349 Dublin 1 | Social protection | ie | 9 | €10.4M |
| 49 | National Treasury Management Agency (NTMA) Dublin | General public services | ie | 8 | €147,800 |
| 50 | Technological University Dublin (TU Dublin) Dublin | Education | ie | 8 | €4.1M |